Bridges and Cables
Obstacle can comes from the bridge air clearance and the navigation quadrangle. The bridge air clearance is defined as being the vertical height of the quadrangle
(defining the width of the navigation channel) that can be drawn under the bridge without touching the bridge beams.
The following table gives the navigation quadrangles of the bridges over the Mekong mainstream between the Green Triangle and the sea.
Picture: Friendship bridge no. 1: Vientiane - Nongkhai
Picture: Friendship bridge no. 2: Mukdahan Savannakhet
Picture: Friendship bridge no. 3: Khammouane-Nakhon Phanom
